Viscosimeter



March 1932- R. c. BECKSTROM ET AL 3 VISCOSIMETER Filed A il 19. 1928 HEATER HEATER gwwmloi K269? C-Becisfian Chm? Edna Patented Mar. 8, 1932 STATES PA NT err-"rs ROBERT C. BEGKSTBOM AND CLARK 1. BABE, or GOLDEN, cotoanno vrscosnvrnrnn Application filed April 19,

The present invention relates to means for determining the viscosity'of materials, and the object is to provide novel mechanism of simple nature for the purpose.

5 In the accompanying drawings Figure 1 is a vertical longitudinal sectional view through a preferred embodiment of the invention.

Figure 2 is a plan View ofthe same.

Figure 3 is a detail view illu'stratingthe detachable cap for the circulating tube.

As disclosed, a base 3 is provided having standards 4, on which is mounted a cylinder member 5. This member preferably consists of a cylindrical body longitudinally bored for a portion of its length, forming a piston or impeller chamber 6. The chamber opens through one end of the bore. An impeller,

preferably of the screw type and shown at 7 2 is rotatably mounted in the chamber 6, being provided with a shaft 8 journaled in the inner end wall of the chamber and having its outer portion journaled in a head 9 fixedto the end 7 of the cylinder member 5 and closing the 7 otherwise open end of said chamber 6.

A motor 10 is mounted on the base 3 and its shaft 11 carries a worm 12 in mesh with a worm wheel 13 fixed to the projecting end of the impeller shaft 8.

, The inner or pressure end of the chamber 6 is provided with an upwardly opening outlet port 14 and a downwardly opening port 15, the latter being in communication with the 3 top of a well casing 16 suspended from the the lower end of an indicating column glass 17that extends well above the cylinder meniber 5 and is backed or otherwise associated with a scale 18. In the well casing 16 is located a body 19 of mercury or other suitable fluid that may be designated as a movable 7 pressure indicating device. The upwardly extending port 14 opens into a vertical tube 20 screwed into the upper side of the cylinder member 5 and carrying a packed cap 21 through which passes a thermometer 22 whose lower end is in the chamber formed by the tube 20.

A reservoir 23 for the fluid whose viscosity is to be determined, is mounted on the outer lower side. Into the bottom of this well opens 7 1928. Serial No; 271,382.

end of the cylinder member and has a bottom opening 24 in communication with the intake end of the impeller chamber 6. A return conduit 25 leads from the chamber 20 .to the reservoir. The outlet end of this conduit may C5 have a cap 26' detachably mounted thereon andprovided with'a discharge orifice 27 delivering into the reservoir 23. Caps having orifices of diiferent sizes are preferably provided. A. second returnconduit 28 leads '6? from the-chamber 20 and deliversinto the reservoir. 23. This conduit. 28 is controlled by a valve 29 located therein; On the rear or solid end of the cylinder member 5 a suitable heater '30 -is mounted,preferably though not necessaril an electric heater of well-known The operation of the instrument is asfollows: The'fluid whose viscosity is to be measured, is poured into the fluid reservoir 23 at the same time that the motorlO is in operation and revolving the screw impeller 7. Said impeller drives the fluid back through the cylindrical chamber 6,.through the chamber 20 and thence through the conduits 25 and u 28, back to the fluid reservoir 23. This'circulation is for the purpose of bringing'all the fluid in the viscosimeter to a common tem- I perature and a homogenousstate. As the fluid circulates through the chamber 20, it is in constant contact with the bulb of the there mometer or other temperature-registering device 22 and the temperature of the circulating fluid is thus accurately registered. The screw impeller 7 also forces the fluid through the port 15 so that it exerts a pressure on the mercury or other fluid 19 contained in the lower portion of the well 16. This pressure forces the said mercury or other fluid in the form of a column up the calibrated tube 17 and the viscosity of the fluid located in the mechanism is thus registered by'the gradations which are properly marked in a well known manner for reading viscosity. It will of course be understood that the temperature of the fluid acted upon is a function of the viscosity. This, as already stated, is made uniform by the constant circulation of the fluid and the degree of temperature is of course controlled by an operation of the heater 80. The amount of circulation is in turn controlled by the valve 29 and the nipple 26 used. Preferably valve 29 is open only while oil is being broughtto uniform temperature. When viscosity readings are being made valve 29 is closed. The flow through nozzle 27 is continuous at all times the machine is being operated.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art, without further description, and it will be understood that various changes in the size, shape, pro portion and minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention;

What we claim, is:

1. A visco-simeter the combination with a cylinder member having a bore with intake and pressure nds, of a reservoir communicating with the intake end of the bore, a heater at the other end of the cylinder memher, an impeller in the bore, a return conduit from the pressure end of the bore delivering into the reservoir, and an indicating fluid column having a well in communication with the pressure side of the bore. a

2. In a viscosimeter, the combination with a cylinder member having a bore opening through one end, of a heater on the other end of the cylinder member, a screw impeller in the here, means for rotating thesame, a re turn conduit leading from the inner end of the bore to the reservoir, a well below the inner end of the bore and in communication therewith, and a pressure indicating column having its lower end communicating with the well. 7 r

In testimony whereof, we aifix our signatures.

ROBERT CV. BECKSTROM. CLARK F. BARB. 

